A workpiece machining jig includes: a base member of an H cross-sectional shape integrally having two vertical flanges and a web having an interior hollow portion and extending horizontally to connect between the vertical flanges; first and second pallets fixed to the opposite surfaces of the web for placing thereon four workpieces, two workpieces on each of the pallets, in a horizontal posture. Each of the pallets has a pallet-side communication hole communicating to the hollow portion, and each of the flanges has a flange-side communication hole communicating to the hollow portion. The pallet-side communication hole of each of the pallets and the flange-side communication hole of a corresponding one of the flanges are interconnected by a tube extending in the hollow portion. Thus, four workpieces are machined concurrently using the single workpiece machining jig.

Robot cell with a robot cell chamber for loading and unloading single-station machine tools and with a machine chamber, wherein at least one robot is arranged in the robot cell chamber and wherein at least two clamping points and at least one machining spindle of a single-station machine tool are arranged in the machine chamber, and so the clamping points for receiving workpieces in the machine chamber can be reached by the robot, wherein the robot cell chamber can be coupled to the machine chamber such that a machining chamber is formed in the state in which the robot cell chamber is coupled to the machine chamber, and a device for machining, wherein the device has a robot cell and a single-station machine tool.

A machine tool with a machine frame with at least one work spindle, at least one workpiece table, which is mounted in the machine frame so as to rotate or swivel about an axis of rotation, which has a supporting structure including a closed, planar partition wall extending across the entire width of the workpiece table transverse to the axis of rotation and across the entire length of the workpiece table parallel to the axis of rotation and which includes at least one workpiece holder. The workpiece table can be transferred into a separating position in which the partition wall is arranged with its largest surface extending transversely to the associated spindle axis and spatially separates a first area of the workpiece table facing the work spindle, in which a workpiece holder faces the work spindle, from a second area of the workpiece table facing away from the work spindle.

A machine tool having a machine frame, at least one work spindle, at least one workpiece table which is mounted in the machine frame to rotate or swivel about an axis of rotation and which includes a closed, planar partition wall, and which includes at least one first workpiece holder and at least one second workpiece holder. The workpiece table, at least in a loading and unloading mode of the machine tool during production, can be transferred into a separating position in which the separating wall is arranged to extend transversely to the allocated spindle axis and spatially separates a working area, in which the first or the second workpiece holder is arranged in the separating position and is accessible to the associated work spindle, is spatially separated from a loading area in which the second or the first workpiece holder is arranged in the separating position.